Fising some symbol visibility issues by adding as dummy object based on the templated class
# Defining a loopback between port A and B is as follows:
# Port = <PortA>,<PortB>,<delay>,<queue size>,<element (packet) size>
[Defaults]
Port= 0,1,1,10,1500
Port= 501,502,1,10,1500
Port= 503,504,10,10,1500
Port= 505,506,100,10,1500
Port= 507,508,1000,10,1500